... supply Boiler Seamless Carbon Steel Pipe ... ,ASTM A 106GRB,A 53, DIN 2448,API 5L standard,aslo we have 8000tons stocks pipeBo We can supply Boiler Seamless ... Carbon Steel Pipe,ASTM A 106GRB ... have 8000tons stocks pipe. Seamless Steel Pipe1) Standard: GB DIN ... : pipe used for mechanical structure, hydraulic pressure, pneumaticlinear actuator3) Material: 10#, 20#, ...